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vendor/khanamiryan/qrcode-detector-decoder/lib/BinaryBitmap.php

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+<?php
+/*
+* Copyright 2009 ZXing authors
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+namespace Zxing;
+
+use Zxing\Common\BitArray;
+use Zxing\Common\BitMatrix;
+
+
+/**
+ * This class is the core bitmap class used by ZXing to represent 1 bit data. Reader objects
+ * accept a BinaryBitmap and attempt to decode it.
+ *
+ * @author dswitkin@google.com (Daniel Switkin)
+ */
+final class BinaryBitmap {
+
+    private  $binarizer;
+    private  $matrix;
+
+    public function __construct($binarizer) {
+        if ($binarizer == null) {
+            throw new \InvalidArgumentException("Binarizer must be non-null.");
+        }
+        $this->binarizer = $binarizer;
+    }
+
+    /**
+     * @return The width of the bitmap.
+     */
+    public function getWidth() {
+        return $this->binarizer->getWidth();
+    }
+
+    /**
+     * @return The height of the bitmap.
+     */
+    public function getHeight() {
+        return $this->binarizer->getHeight();
+    }
+
+    /**
+     * Converts one row of luminance data to 1 bit data. May actually do the conversion, or return
+     * cached data. Callers should assume this method is expensive and call it as seldom as possible.
+     * This method is intended for decoding 1D barcodes and may choose to apply sharpening.
+     *
+     * @param y The row to fetch, which must be in [0, bitmap height)
+     * @param row An optional preallocated array. If null or too small, it will be ignored.
+     *            If used, the Binarizer will call BitArray.clear(). Always use the returned object.
+     * @return The array of bits for this row (true means black).
+     * @throws NotFoundException if row can't be binarized
+     */
+    public function getBlackRow($y, $row)  {
+        return $this->binarizer->getBlackRow($y, $row);
+    }
+
+    /**
+     * Converts a 2D array of luminance data to 1 bit. As above, assume this method is expensive
+     * and do not call it repeatedly. This method is intended for decoding 2D barcodes and may or
+     * may not apply sharpening. Therefore, a row from this matrix may not be identical to one
+     * fetched using getBlackRow(), so don't mix and match between them.
+     *
+     * @return The 2D array of bits for the image (true means black).
+     * @throws NotFoundException if image can't be binarized to make a matrix
+     */
+    public function getBlackMatrix(){
+// The matrix is created on demand the first time it is requested, then cached. There are two
+// reasons for this:
+// 1. This work will never be done if the caller only installs 1D Reader objects, or if a
+//    1D Reader finds a barcode before the 2D Readers run.
+// 2. This work will only be done once even if the caller installs multiple 2D Readers.
+        if ($this->matrix == null) {
+            $this->matrix = $this->binarizer->getBlackMatrix();
+        }
+        return $this->matrix;
+    }
+
+    /**
+     * @return Whether this bitmap can be cropped.
+     */
+    public function isCropSupported() {
+        return $this->binarizer->getLuminanceSource()->isCropSupported();
+    }
+
+    /**
+     * Returns a new object with cropped image data. Implementations may keep a reference to the
+     * original data rather than a copy. Only callable if isCropSupported() is true.
+     *
+     * @param left The left coordinate, which must be in [0,getWidth())
+     * @param top The top coordinate, which must be in [0,getHeight())
+     * @param width The width of the rectangle to crop.
+     * @param height The height of the rectangle to crop.
+     * @return A cropped version of this object.
+     */
+    public function crop($left, $top, $width, $height) {
+        $newSource = $this->binarizer->getLuminanceSource()->crop($left, $top, $width, $height);
+        return new BinaryBitmap($this->binarizer->createBinarizer($newSource));
+    }
+
+    /**
+     * @return Whether this bitmap supports counter-clockwise rotation.
+     */
+    public function isRotateSupported() {
+        return $this->binarizer->getLuminanceSource()->isRotateSupported();
+    }
+
+    /**
+     * Returns a new object with rotated image data by 90 degrees counterclockwise.
+     * Only callable if {@link #isRotateSupported()} is true.
+     *
+     * @return A rotated version of this object.
+     */
+    public function rotateCounterClockwise() {
+        $newSource = $this->binarizer->getLuminanceSource()->rotateCounterClockwise();
+        return new BinaryBitmap($this->binarizer->createBinarizer($newSource));
+    }
+
+    /**
+     * Returns a new object with rotated image data by 45 degrees counterclockwise.
+     * Only callable if {@link #isRotateSupported()} is true.
+     *
+     * @return A rotated version of this object.
+     */
+    public function rotateCounterClockwise45() {
+        $newSource = $this->binarizer->getLuminanceSource()->rotateCounterClockwise45();
+        return new BinaryBitmap($this->binarizer->createBinarizer($newSource));
+    }
+
+//@Override
+    public function toString() {
+        try {
+            return $this->getBlackMatrix()->toString();
+        } catch (NotFoundException $e) {
+            return "";
+        }
+    }
+
+}